Media mail is made for just this type of item. It's media.
I would only use a strong box, though. Envelopes will allow damage.
I would only use a strong box, though. Envelopes will allow damage.
They don't ask to see the contents.
However, the USPS reserves the right to open the box and see if the items qualify for media mail.
You won't have any problems.
However, the USPS reserves the right to open the box and see if the items qualify for media mail.
You won't have any problems.
You might get away with media mail, but ther post office will tell you anything with an advertisement in it won't qualify as media. If they open it you will have to pay their regular rate. I think this USPS policy came out of being scammed by ebay sellers.